five companies are making vaccine, but this is the only one in america. i see all these needles going into the top of the egg. is that the virus going into the egg itself? >> lee: there's the needle that comes down. the virus is then introduced in... directly to the egg. the eggs exit the machine and are loaded onto carts. these carts are then wheeled into incubators, where they're environmentally controlled for temperature and humidity. >> pelley: the virus grows in the eggs; later, its killed and refined into vaccine. the process takes three months. most of that is testing for safety and sterility. sanofi pasture has a federal contract to make 75 million doses. they will go through millions of eggs. the farms are around the plant here? >> lee: because of security reasons, i'm not at liberty to share specific, exact locations. >> pelley: these are secret egg farms? >> lee: we don't want to reveal the location for security reasons. >> pelley: the farms in undisclosed locations are considered so important to national security that, among the first to get t